:root{--cityu-green:#096e5e;--cityu-green-2:#0b8a74;--ink:#13231f;--muted:#62706c;--line:#dfe7e4;--panel:#fff;--soft:#f8fbfa;--soft-green:#eef7f4;--danger:#a43b35;--shadow:0 12px 30px #14282414;--radius:8px}*{box-sizing:border-box}html{background:var(--soft)}body{color:var(--ink);background:var(--soft);margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}.shell{width:min(1280px,100% - 40px);margin:0 auto}.site-header{background:#fff}.topbar{color:var(--ink);justify-content:space-between;align-items:center;padding:20px 0;display:flex}.brand-badge{border:1px solid var(--line);color:#096e5e;letter-spacing:0;background:#edf7f3;border-radius:9999px;align-items:center;gap:8px;padding:4px 12px;font-size:12px;font-weight:500;line-height:1rem;display:inline-flex}.brand-badge-icon{color:#096e5e;flex:none;width:14px;height:14px}.nav{color:var(--muted);align-items:center;gap:8px;font-size:14px;display:flex}.nav a,.ghost-button{border:1px solid var(--line);background:#ffffffb8;border-radius:999px;padding:8px 12px}.hero-band{border-bottom:1px solid var(--line);background:#fff}.hero{grid-template-columns:1.3fr .7fr;align-items:end;gap:24px;padding:32px 0;display:grid}.hero-brand-badge{margin-bottom:12px}.eyebrow{color:var(--cityu-green);text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:800;line-height:1}h1{letter-spacing:-.04em;margin:10px 0;font-size:clamp(30px,4.5vw,46px);line-height:1.05}.hero h1{margin:0}.lead{color:var(--muted);max-width:640px;font-size:15px;line-height:1.55}.metric-card{border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);background:#ffffffd6;padding:16px}.metric-card strong{color:var(--cityu-green);font-size:30px;line-height:1;display:block}.metric-card span{color:var(--muted);font-size:14px;line-height:1.55}.grid{gap:20px;padding:24px 0 64px;display:grid}.card{border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);background:#ffffffe6;padding:20px}.meeting-card{grid-template-columns:1fr auto;gap:20px;display:grid}.card h2,.card h3{letter-spacing:-.025em;margin:0 0 10px}.card p{color:var(--muted);margin:0;font-size:15px;line-height:1.65}.meta{color:var(--muted);flex-wrap:wrap;gap:9px;margin:16px 0;font-size:13px;line-height:1;display:flex}.pill{background:var(--soft);border:1px solid var(--line);color:var(--muted);border-radius:999px;align-items:center;gap:6px;padding:6px 9px;font-size:12px;font-weight:700;line-height:1;display:inline-flex}.pill.live{color:var(--cityu-green);background:var(--soft-green);border-color:#096e5e33}.pill.ended{color:var(--muted)}.groups{flex-wrap:wrap;gap:7px;margin-top:12px;display:flex}.group{color:var(--cityu-green);background:var(--soft-green);border:1px solid #096e5e29;border-radius:999px;padding:6px 9px;font-size:12px;font-weight:700;line-height:1}.actions{flex-wrap:wrap;align-items:center;gap:8px;margin-top:16px;display:flex}.button{background:var(--cityu-green);color:#fff;cursor:pointer;border:0;border-radius:6px;justify-content:center;align-items:center;gap:8px;min-height:40px;padding:8px 16px;font-size:13px;font-weight:700;line-height:1;display:inline-flex;box-shadow:0 8px 18px #096e5e24}.button.secondary{color:var(--cityu-green);box-shadow:none;background:#fff;border:1px solid #096e5e38}.button.danger{background:var(--danger)}.page{padding:24px 0}.two-column{grid-template-columns:1fr 380px;align-items:start;gap:20px;display:grid}.form{gap:16px;display:grid}label{color:var(--muted);gap:8px;font-size:14px;font-weight:500;line-height:1.2;display:grid}input,textarea,select{border:1px solid var(--line);width:100%;color:var(--ink);background:#fff;border-radius:6px;padding:8px 12px}input,select{min-height:40px}textarea{resize:vertical;min-height:108px}.notice{background:var(--soft-green);color:var(--cityu-green);word-break:break-all;border:1px solid #096e5e2e;border-radius:8px;padding:12px 16px;font-size:13px;font-weight:700;line-height:1.45}.error{color:var(--danger);font-size:13px;font-weight:700;line-height:1.4}.table{border-collapse:collapse;width:100%;font-size:14px;line-height:1.4}.table th,.table td{text-align:left;border-bottom:1px solid var(--line);padding:12px 10px}.table th{color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-size:12px}.admin-list{gap:12px;display:grid}.admin-item{border:1px solid var(--line);background:#fff;border-radius:8px;justify-content:space-between;gap:16px;padding:16px;display:flex}.admin-dashboard{background:var(--soft);min-height:100vh}.admin-dashboard-header{border-bottom:1px solid var(--line);background:#fff}.dashboard-hero{grid-template-columns:1fr auto;align-items:end;gap:20px;padding-top:32px;padding-bottom:32px;display:grid}.admin-dashboard-badge{margin-bottom:12px}.dashboard-hero h1{color:#17312d;letter-spacing:0;margin:0;font-size:30px;font-weight:600;line-height:1.2}.dashboard-hero .lead{margin:8px 0 0;font-size:14px;line-height:1.55}.admin-header-actions{flex-wrap:wrap;justify-content:flex-end;gap:8px;display:flex}.admin-dashboard-content{gap:20px;padding-top:24px;padding-bottom:24px;display:grid}.dashboard-grid{grid-template-columns:repeat(3,1fr);gap:20px;display:grid}.stat{border:1px solid var(--line);box-shadow:var(--shadow);background:#fff;border-radius:8px;padding:20px}.stat strong{color:var(--cityu-green);margin-bottom:8px;font-size:30px;line-height:1;display:block}.stat span{color:var(--muted);font-size:13px}.admin-table-actions{flex-wrap:wrap;gap:8px;display:flex}.admin-tools{justify-content:space-between;align-items:center;gap:20px;display:flex}.modal-backdrop{z-index:20;background:#13231f6b;place-items:center;padding:20px;display:grid;position:fixed;inset:0}.modal-panel{border:1px solid var(--line);background:#fff;border-radius:8px;gap:16px;width:min(440px,100%);padding:20px;display:grid;box-shadow:0 24px 70px #13231f38}.modal-header{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.modal-header h3{letter-spacing:-.025em;margin:8px 0 0}.modal-panel p{color:var(--muted);margin:0;font-size:14px;line-height:1.55}.icon-button{width:40px;padding:0;font-size:20px;line-height:1}.tool-qr{justify-self:center;width:min(260px,100%);height:auto}.cache-clear-card{max-width:720px;margin:0 auto}.cache-clear-card h1{margin-top:10px}@media (max-width:760px){.hero,.two-column,.meeting-card,.dashboard-hero,.dashboard-grid{grid-template-columns:1fr}.admin-tools{flex-direction:column;align-items:stretch}.topbar{flex-direction:column;align-items:flex-start;gap:14px}.nav{flex-wrap:wrap}}.qr-section{margin-top:20px}.qr-panel{grid-template-columns:1fr auto;align-items:center;gap:20px;display:grid}.qr-image{border:1px solid var(--line);background:#fff;border-radius:8px;width:176px;height:176px;padding:12px}.qr-placeholder{border:1px dashed var(--line);width:176px;height:176px;color:var(--muted);background:var(--soft);border-radius:8px;place-items:center;font-size:13px;display:grid}.expired-card{max-width:720px;margin:0 auto}.qr-stage-control{border:1px solid var(--line);background:#fff;border-radius:8px;gap:6px;margin-top:16px;padding:4px;display:inline-flex}.qr-stage-control button{min-height:34px;color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:6px;padding:0 12px;font-size:13px;font-weight:800}.qr-stage-control button.active{color:#fff;background:var(--cityu-green)}@media (max-width:760px){.qr-panel{grid-template-columns:1fr}}.qr-display-page{padding-top:32px}.qr-display-shell{background:#f7faf9;place-items:center;min-height:100vh;padding:clamp(24px,4vw,56px);display:grid}.qr-display-hero{grid-template-columns:minmax(360px,.9fr) minmax(460px,1fr);align-items:center;gap:clamp(28px,4vw,64px);width:min(1440px,100%);display:grid}.qr-display-info{gap:18px;display:grid}.qr-display-info h1{color:#0f1c19;letter-spacing:0;max-width:920px;margin:0;font-size:clamp(44px,5.5vw,82px);line-height:1}.qr-display-info p{color:#3d4a47;max-width:760px;margin:0;font-size:clamp(18px,1.8vw,26px);line-height:1.5}.qr-display-info dl{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:8px 0 0;display:grid}.qr-display-info dl div{border:1px solid var(--line);background:#fff;border-radius:8px;padding:14px}.qr-display-info dt{color:var(--muted);text-transform:uppercase;font-size:13px;font-weight:800}.qr-display-info dd{color:var(--ink);margin:6px 0 0;font-size:clamp(16px,1.4vw,21px);font-weight:800;line-height:1.35}.qr-display-board{background:#fff;border:1px solid #096e5e29;border-radius:8px;padding:clamp(18px,2.5vw,34px);box-shadow:0 18px 48px #1428241a}.qr-display-board .qr-panel{text-align:center;grid-template-columns:1fr;justify-items:center;gap:22px}.qr-display-board .qr-panel h3{margin:0 0 10px;font-size:clamp(28px,3vw,44px);line-height:1.05}.qr-display-board .qr-panel p{max-width:520px;color:var(--muted);margin:0 auto;font-size:clamp(16px,1.4vw,20px);line-height:1.45}.qr-display-board .qr-image,.qr-display-board .qr-placeholder,.qr-display-card .qr-image,.qr-display-card .qr-placeholder{width:min(52vw,520px);height:min(52vw,520px);padding:18px}.qr-display-error-card{width:min(720px,100%);box-shadow:var(--shadow);text-align:center;background:#fff;border:1px solid #a43b352e;border-radius:8px;padding:clamp(22px,4vw,42px)}.qr-display-error-card h1{color:var(--danger);letter-spacing:0;margin:10px 0;font-size:clamp(32px,5vw,54px)}.qr-display-error-card p{max-width:520px;color:var(--muted);margin:0 auto;font-size:16px;line-height:1.55}.qr-image svg{width:100%;height:100%;display:block}@media (max-width:980px){.qr-display-hero,.qr-display-info dl{grid-template-columns:1fr}.qr-display-info h1{font-size:clamp(36px,9vw,58px)}.qr-display-board .qr-image,.qr-display-board .qr-placeholder{width:min(82vw,440px);height:min(82vw,440px)}}.success-card{background:var(--soft-green);color:var(--cityu-green);border:1px solid #096e5e2e;border-radius:8px;padding:20px}.success-card h2{letter-spacing:-.02em;margin:10px 0 6px}.success-card p{color:var(--cityu-green);font-size:15px;font-weight:700}.wechat-required-card{text-align:center;justify-items:center;gap:16px;max-width:720px;margin:0 auto;display:grid}.wechat-logo{width:86px;height:86px;display:block}.wechat-required-card .lead{margin:0 auto}.wechat-required-card .actions{justify-content:center}